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High-strength magnesium alloy material and preparation method thereof

A magnesium alloy and high-strength technology, which is applied in the field of high-strength magnesium alloy materials and its preparation, can solve problems such as limiting the development of magnesium alloys, and achieve the effects of reasonable design, convenient operation, and increased strength

Active Publication Date: 2019-12-13
齐齐哈尔悦隆科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The yield strength of the high-strength and tough WE54 magnesium alloy is between 220-240MPa, the tensile strength is only

Method used

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  • High-strength magnesium alloy material and preparation method thereof
  • High-strength magnesium alloy material and preparation method thereof
  • High-strength magnesium alloy material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0044] Embodiment 1: high-strength magnesium alloy material formula 1 and its preparation method:

[0045] This embodiment provides a high-strength magnesium alloy material, which is composed of the following components: Lu: 3.0wt.%, Ni: 1.5wt.%, Ca: 0.3wt.%, and the balance is Mg and unavoidable impurities. The mass ratio of Lu to Ni is 2:1.

[0046] This embodiment also provides a method for preparing the above-mentioned high-strength magnesium alloy material, including:

[0047] 1) Preheat the metal raw materials. Under the action of nitrogen protective gas, add Mg, Mg-Lu master alloy and Ni into the furnace, raise the temperature to 750°C, and cool down to 720°C after the Mg, Mg-Lu master alloy and Ni melt. Add Ca at ℃, and cast magnesium alloy after Ca melts;

[0048] 2) Homogenizing the obtained as-cast magnesium alloy at a temperature of 240° C. and a holding time of 8 hours;

[0049] 3) The homogenized magnesium alloy is subjected to hot extrusion treatment, and th...

Embodiment 2

[0050] Embodiment 2: high-strength magnesium alloy material formula 2 and its preparation method:

[0051] This embodiment provides a high-strength magnesium alloy material, which is composed of the following components: Lu: 2.8wt.%, Ni: 1.4wt.%, Ca: 0.5wt.%, and the balance is Mg and unavoidable impurities. The mass ratio of Lu to Ni is 2:1.

[0052] This embodiment also provides a method for preparing the above-mentioned high-strength magnesium alloy material, which is basically the same as in Embodiment 1, except that:

[0053] Casting: heat up to 750°C, then cool down to 730°C;

[0054] Homogenization treatment: the temperature is 230°C, and the holding time is 10h;

[0055] Extrusion: The temperature is 400°C, the extrusion speed is 0.12m / s, and the extrusion ratio is 30:1.

Embodiment 3

[0056] Embodiment 3: high-strength magnesium alloy material formula 3 and its preparation method:

[0057] This embodiment provides a high-strength magnesium alloy material, which is composed of the following components: Lu: 2.9wt.%, Ni: 0.8wt.%, Ca: 0.4wt.%, and the balance is Mg and unavoidable impurities. The mass ratio of Lu to Ni is 3.625:1.

[0058] This embodiment also provides a method for preparing the above-mentioned high-strength magnesium alloy material, which is basically the same as in Embodiment 1, except that:

[0059] Casting: heat up to 760°C, then cool down to 730°C;

[0060] Homogenization treatment: the temperature is 230°C, and the holding time is 10h;

[0061] Extrusion: The temperature is 390°C, the extrusion speed is 0.15m / s, and the extrusion ratio is 28:1.

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Abstract

The invention relates to the technical field of high-strength magnesium alloy materials and particularly relates to a high-strength magnesium alloy material. The magnesium alloy material is prepared from the following components: 2.0-3.5 wt.% of Lu, 0.8-1.5 wt.% of Ni, 0.1-0.5 wt.% of Ca and the balance of Mg and unavoidable impurities, wherein the content of the impurities is less than or equal to 0.03 wt.%; and the mass ratio of magnesium alloyed elements, i.e. Lu and Ni, ranges from (2 to 1) to (4 to 1). Alloyed elements, i.e. Lu, Ni and Ca, are added into a magnesium alloy at a specific ratio, and are treated by a casting and squeezing process to prepare the high-strength magnesium alloy material; and the magnesium alloy has the tensile strength up to 320-340 MPa, the yield strength upto 260-290 MPa and the elongation percentage more than 8%, so that the magnesium alloy is an excellent high-strength magnesium alloy material.

Description

technical field [0001] The invention relates to the technical field of high-performance magnesium alloy materials, in particular to a high-strength magnesium alloy material and a preparation method thereof. Background technique [0002] Magnesium alloy is an alloy composed of magnesium and other elements. It has the advantages of good casting performance, strong shock absorption performance, high mold life and strong dimensional stability. In addition, the density of magnesium alloy is only 1.8-2.0g / cm 3 , is 2 / 3 of aluminum and 1 / 4 of steel. The use of magnesium alloy can reduce the weight of the whole vehicle, which can be reduced by 15-20% on the basis of aluminum alloy. However, the mechanical properties (strength and ductility) of magnesium alloys are generally low. For example: the AZ31B magnesium alloy bar widely used in the market at present has a yield strength of only 110MPa, a tensile strength of only 220MPa, and an elongation of 5.0%. The yield strength of th...

Claims

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Application Information

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IPC IPC(8): C22C23/06C22C1/03C22F1/06
CPCC22C1/03C22C23/06C22F1/06
Inventor 冷哲蔡璐胡金飞万德余李伟宋雷
Owner 齐齐哈尔悦隆科技有限公司